Electrical switch.



No. 741,490. PATENTED 00-1 13,1903.

A.E.HANDY.I ELECTRICAL SWITCH.

' APPLICATION FILED APR; 15, 1903.

N0 MODEL.

wwmw'y Q No. 741,490. V

UNITED STATES Patented October 13, 1903.

PATENT OFFICE.

ARTHUR E. HANDY, PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE RHODE ISLANDELEVATOR AND MACHINE COMPANY, OF PROVIDENCE,

,ELECTRtCAL SWITCH.

SPECIFICATION formingpart of Letters Patent No. 741,490, dated October13, 1903.

Application filed April 15, I903. Serial No. 152,662. (No model.)

T0 at whom it may concern.- 7

Be it known that I, ARTIEIURQE; H NDY, a resident of Providence, in thecounty of Providence and State of Rhode Island, have invented certainnew and useful Improvements in Electrical Switches; and I doherebydeclare that the following is a full, clear, and exact descriptionthereof, referencebeing had to p the accompanying drawings, and to thelet- [0 ters of reference marked thereon, which form a part of thisspecification.

This invention relates to electrical switches of the class moreparticularly designed to be operated by opening and closing the doors inelevator-wells and are for the purpose of making and breaking thecurrent which acts on a device to lock the car when the door is opened.

The object of the invention is to construct a simple and practicaldevice which will work positively to make and break the electriccurrentby a quick action and one that will have a long stroke of the push'pin'or button to compensate for 10st motion and wear of the slidingelevator-doors. 7 It is fully described in the specificationand'illustrated in the accompanying drawings.

Figure 1 is a side elevation of the device with the cover of the caseremoved, showing 0 the mechanism within. Fig. 2 is a perspective View ofthe swinging arm which makes and breaks the current by swinging itsouter end in between the contact-pieces. Fig. 3 is a sectional View ofthe contact-pieces in po- 3 5 sition between the insulation-blocks. Fig.4: is a perspective view of the contact-pieces in their relativeposition to each other,showing the binding-posts secured to their ends.

In the drawings, A is the case which is 0 made to inclosethe operatingmechanism. The cover of this case is removed in Fig. 1, exposing to viewall of the parts. The main lever B is pivoted at b and has an outwardand slightly downwardly extending arm I),

5 in the end of which arm is fixed a pin 0.

B is the button or pin which is connected to the lever B and projectsout through the casing A to be operated on and pressed in by closing theelevator-door. The spring a is coiled around the hub of lever B and hasone end resting against the casin g, while the other end engages thelever B at a. The tension of this spring holds said lever normally inthe forward position.

O is a swinging arm pivoted at c and slotted at its center portion (1 toreceive the end of pin 0. Extending outward from the lower end of thisarm is a pin d, of non-conducting material, and fixed to the end of thispin d is a tip e, of conducting material, which tip is forced by theinward movement of this arm in between the spring-lips g g of thecontact-pieces g g, forming an electrical connection between them. Fixedto the outer ends of each contact-piece is a binding-post h h. Thebinding-screws '11 t are for securing the ends of the conducting-wiresis it. These contact-pieces are held in blocks m, m, of fiber or anysuitable non-conducting material, with layers of mica 12 between them.

The operation of the device is as follows: The switch "is fastened tothe framework of an elevator-well by screws through the ears 1' r. Theconducting-wires k'k lead from the binding-posts t i to the mechanismbelow, which operates to lock the elevator when the door is opened. Inclosing the well-door it comes in contact with and drives in the pin B,carrying with it the lever B and arm 0 to. the position shown in dottedlines in Fig. 1. By making a connection to this arm 0 close to itspivoted end the initial movement of this arm is necessarily veryquick.Then, as the lever B is thrown over, carrying the arm 0 with it, the pin0 travels down the 85 slot d and both the motion and the speed of thearm are decreased to theminimum. The outer end of this armC is forced inbetween the two contact-pieces g g with a sharp quick motion and thecircuit is completed, releasing the look below (not shown) and allowingthe elevator to move. By my arrangement of lovers I get a large amountof extra motion on the head e of the arm O and also get a sharp quickthrow of the head as it enters and leaves the contact-pieces. This quickthrow is absolutely necessary to the successful working of this class ofswitch. This device is verysimple, practical, and efficient in itsconstruction and operation and is well calculated to withstand andoperate under the constant shock of a slamming elevatordoor against itand at the same time compensate for the looseness or loss of motion andwear in the sliding doors.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a device of the character described, a casing, springcontact-plates connected with the Wire-terminals, a spring-actuatedlever pivoted at one end in said casing, a push-pin pivoted on theopposite end of said lever, a swinging arm pivoted near its end oppositeto that of said lever the swinging end of said arm having a head ofconducting material, a slot in said arm, a lever-actuated pin engagingthe slot in said arm near its pivoted end so as to give the swinging endan accelerated motion when it enters and leaves the contactplates,substantially as described.

2. In a device of the character described, a casing, springcontact-plates connected with the wire-terminals,a spring-actuated leverpivoted at one end to the casing, apush-pin connected on the oppositeend of said lever, a contact-arm pivoted near its end opposite to thatof said lever, a slot in said arm, alever-actuated pin engaging the slotin said arm nearest its pivoted end when said arm is out of engagementwith said contact-plates, said pin gradually receding in said slot fromsaid pivotal point as the arm enters the contact-plates for the purposeof obtaining a quicker action in entering and leaving said plates whensaid push-pin is operated, substantially as described.

3. In a device of the character described, contact-plates, havingspring-lips and connected to the wire-terminals, a slotted arm held toswing from one end and carry a head of conducting material on the end ofa nonconducting pin extending out from said arm, a push-pin,a leverpivoted at one end and engaging said push-pin at its opposite end, anarm on said lever, a pin in said arm engaging the slot in said swingingarm, a spring bearing against said lever to draw out the swinging armand break the connection between said contact-plates when the pressureon the pushpin is relieved, substantially as described.

4.. In a device of the character described,wire-terminals,contact-plateseachhavingone end turned back nearly uponitself, forming spring-lips and connected to said wire-terminals,aslotted arm pivoted at one end, an insulated head of conductingmaterial held on the end of said arm, a pushpin, a lever pivoted at oneend and engaging said push-pin at its opposite end, an arm on saidlever, a pin fixed in said lever-arm engaging the slot in said swingingarm to give said swinging arm an accelerated motion when said lever ismoved, a spring acting on said lever to keep it in its outward position,substantially as described.

In testimony whereof I have hereunto set my hand this 11th day of April,A. D. 1903.

ARTHUR E. HANDY. In presence of-- HOWARD E. BARLoW, E. I. OGDEN.

